C910 Series. Single-point heat-tracing control system

Transcription

1 1. Pipe Freeze Protection and Flow Maintenance Single-point heat-tracing control system 2. Roof and Gutter De-Icing Product overview The DigiTrace C910 is a compact, fullfeatured, microprocessor-based, singlepoint commercial heating cable control system with integrated equipment groundfault protection. The C910 provides control and monitoring of electric heating cable circuits for commercial heating applications. The C910 can be set to monitor and alarm for high and low temperature, low current, and ground-fault level. The C includes a communication module to remotely configure, control and monitor the heating cable circuits through a building management system (BMS). Control The C910 measures temperature with one or two 3-wire 100-ohm platinum RTD(s) connected directly to the unit. The controller may be used in line-sensing, ambientsensing and proportional ambient-sensing control (PASC) modes. Monitoring A variety of parameters are measured, including ground fault, temperature, and C910 current to ensure system integrity. The system can be set to periodically check the heating cable for faults, alerting maintenance personnel of a heat-tracing problem. Both an isolated solid-state triac relay and a dry contact relay are provided for alarm annunciation back to a distributed control system (DCS) or a building management system (BMS). Ground-fault protection National electrical codes require groundfault equipment protection on all heattracing circuits. The C910 controllers incorporate ground-fault sensing, alarm, and trip functionality internally. Heating cable circuits equipped with C910 controllers do not require additional ground-fault protection equipment, simplifying installation and reducing costs. The C910 automatically tests the integrity of the integrated ground-fault circuitry, ensuring protection in the event of a ground fault. Installation The C910 unit comes ready to install right from the box, eliminating the need for custom panel design or field assembly. The NEMA 4X-rated FRP enclosure is approved for use in indoor and outdoor locations. Wiring is as simple as connecting the incoming and outgoing power wiring (up to 277 Vac) and an RTD. The C910 operator interface includes LED displays and function keys that make it easy to use and program. No additional handheld programming devices are needed. Alarm conditions and programming settings are easy to interpret on the full-text front panel. Settings are stored in nonvolatile memory in the event of power failure. Communications The C supports ModBus protocol and includes an RS-485 communications interface. 3. Surface Snow Anti-Icing MI 4. Surface Snow Anti-Icing ElectroMelt 5. Freezer Frost Heave Prevention 6. Floor Heating 7. Technical Data Sheets 8. Engineering Specifications 9. Index H /09 (800) of 4

2 General Area of use Approvals Nonhazardous locations Nonhazardous locations Supply voltage 100 Vac to 277 Vac, +5/ 10%, 50/60 Hz Common supply for controller and heat-tracing circuit Enclosure Protection Materials Ambient operating temperature range Ambient storage temperature range Relative humidity Control Relay type Voltage, maximum Current, maximum Control algorithms Control range NEMA 4X FRP 40 F to 140 F ( 40 C to 60 C) 40 F to 185 F ( 40 C to 85 C) 0% to 90%, noncondensing Double-pole, mechanical 277 Vac nominal, 50/60 Hz F (40 C) derated to F (60 C) EMR: On/off, proportional ambient sensing control (PASC) 0 F to 200 F ( 18 C to 93 C) Typical Enclosure Dimensions C in (175 mm) 8.9 in (226 mm) 6.0 in (152 mm) 10.5 in (267 mm) 11.0 in (279 mm) 2 of 4 (800) H /09

3 Monitoring Temperature Low alarm range 0 F to 180 F ( 18 C to 82 C) or OFF High alarm range 0 F to 200 F ( 18 C to 93 C) or OFF Ground fault Alarm range 20 ma to 100 ma Trip range 20 ma to 100 ma Current Low alarm range 0.3 A to 30 A or OFF Autocycle Diagnostic test interval adjustable from 1 to 240 minutes or 1 to 240 hours 1. Pipe Freeze Protection and Flow Maintenance 2. Roof and Gutter De-Icing Temperature Sensor Inputs Quantity Types Two inputs standard 100 Ω platinum RTD, 3-wire, α = ohms/ohm/ C Can be extended with a 3-conductor shielded cable of 20 Ω maximum per conductor 3. Surface Snow Anti-Icing MI Alarm Outputs AC relay Isolated solid-state triac, SPST, 0.75 A maximum, 100 Vac to 277 Vac nominal Dry contact relay Pilot duty only, 48 Vac/dc, 500 ma maximum, 10 VA maximum resistive switching Note: Outputs are configurable as open on alarm or close on alarm Programming and Setting Method Units Digital display LEDs Memory Stored parameters (measured) Alarm conditions Other Connection Terminals Power supply input Heating cable output Ground RTD/alarm/communications Mounting FRP enclosure Programmable keypad Imperial ( F, in.) or Metric ( C, mm) Actual temperature, control temperature, heater current, ground fault, programming parameter values, alarm values Current mode, heater on, alarm condition, receive/transmit data Nonvolatile, restored after power loss, checksum data checking Minimum and maximum temperature, maximum ground-fault current, maximum heater current, contactor cycle count, time in use Low/high temperature, low current Ground-fault alarm, trip RTD failure, loss of programmed values, or EMR failure Password protection Screw terminals, 22 8 AWG Screw terminals, 22 8 AWG Two box lugs, 14 6 AWG AWG spring clamp terminals Surface mounting with four fixing holes on 6.0 in x 11.0 in (152 mm x 279 mm) centers Hole diameter: 0.31 in (8 mm) 4. Surface Snow Anti-Icing ElectroMelt 5. Freezer Frost Heave Prevention 6. Floor Heating 7. Technical Data Sheets Communications with C Protocol Topology Cable Length Quantity Address ModBus RTU / ASCII Multidrop, daisy chain Single shielded twisted pair, 26 AWG or larger 1.7 miles (2.7 km) 9600 baud Up to 32 devices without repeater Programmable 8. Engineering Specifications 9. Index H /09 (800) of 4

4 Ordering Details DigiTrace C910 Single-point Heat-Tracing Control System Description Catalog number Part number Weight/lbs DigiTrace C910 controller in an 8" x 10" FRP enclosure with window. 2-pole 30 A EMR. Controls a single circuit with a 2-pole electromechanical relay. (Approved for nonhazardous locations only) DigiTrace C910 controller in an 8" x 10" FRP enclosure with window. 2-pole 30 A EMR. Controls a single circuit with a 2-pole electromechanical relay. Includes an isolated 2-wire RS-485 communication option. (Approved for nonhazardous locations only) C C RTD Sensors 100-ohm platinum RTD with 10 foot stainless steel corrugated sheath RTD10CS RTD10CS 1.0 RTD, ambient, cable style RTD RTD, 100 F to 900 F, pipe mounted RTD4AL RTD4AL of 4 (800) H /09

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